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n a n s .m e e h S 8 R B K G U m D s a d 0 M 0 WEB PRINTING AND DELIVERYMECHANISM.

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S. D. TUCKER.

WEB PRINTING AND DELIVERY MECHANISM. No. 380,001.)

Patented Mar- 2 1883;

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I S.- D-;-TUCKER WEB PRINTING AND DELIVERY MECHANISM No. 380,001.Patented Mar. 27,1888.

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s. TUCKER. I WEB PRINTING AND DELIVERY'MEGHANISM. No; 380,001.

Patented Mar. 1888.

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S. D. TUCKER.

WEB PRINTING AND DELIVERY MECHANISM.

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No. 300,001. .PatentdMari'],1888; I

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UNITE STATES STEPHEN D. TUCKER,

PATENT Curios.

OF NEW YORK, Y.

SPECIFICATION forming part of Letters Patent No. 380,001, dated March27, 1888.

Application filed March 8, 1884.

To all whom it may concern:

Be it known that I, STEPHEN D. TUCKER, a citizen of the United States,residing in the city of New York, county of New York, and State of NewYork, have invented certain new and useful Improvements in Web Printingand Delivery Mechanism, fully described and represented in the followingspecification and the same.

The present invention relates to that class of web-printing machines inwhich the forms for printing both sides of the web are carried upon asingle cylinder, and in which the web after being printed upon one sideis turned accompanying drawings, forming a part of the over andrepresented to the same forms to be.

sess many desirable characteristics and have gone into extensive use,particularly in those establishments where it is desired to printdirectly from the type instead of from stereotype or other plates. When,however, the printing is to be done from the type, it is necessary tomake the form'cylinder of a very much larger size than when plates areto be used, as in practice it is found impossible to successfully secureordinary parallel type onto a cylinder as small as those commonlyemployed when plates are used; and when a cylinder of sufficient size tosuccessfully carry the forms in type is used, it will be so large thatthe forms for printing both sides of an ordinary folio or four-pagenewspaper will occupy very much less than its whole circumference, andthis fact makes itnecessary in this class of machines, when the printingis to be done directly from the type, to provide an increased number ofimpressioncylinders and register-rolls, so that the forms will make twoor more impressions upon each side of the web at each revolution of theformcyli-nder.

t Itwill readily be seen that when a web is perfected by a mechanism ofthis character its altern'ate fsheets or pair or series of sheets willhave different matter upon their upper or outer surfaces, and if thecolumns of the" forms are Serial No. 123,482. (No model.)

.placed lengthwise of theIform-cylinder, as is usual when printing fromtype, the heads of their pages will be at opposite sides of the machine,and this fact makes it necessary, in order to pile the sheets in aregular and orderly manner, to provide two flies and means for directingthe alternate sheets or series of sheets to each. s I

It is the principal object of the present invention to increase thespeed of the machines of thiggzharacter; and to this end the inventionconsists in a means for aiding and easing the travel of the web duringits passage through the turning or reversing mechanism between theprinting of its opposite sides, and also in meansfor flying the sheetsin two piles at greater speed than has heretofore been attained.

The invention also embraces various details of construction andcombinations of parts both in the printing and delivery mechanisms, all'of which will be hereinafter fully explained and particularly pointedout.

Referring to the accompanying drawings, Figure 1 is a side elevation ofa web-printing mechanism of the character just specified embodyingcertain features of the present invention. Fig. 2 is a like view of adelivery mech anism therefor embodying certain other features of theinvention. tion of the delivery mechanism, looking from the right ofFig. 2. Fig. 4 is an elevation of the web-turning mechanism, lookingfrom the rear of Fig. 1. Fig. 5 is a plan view of the same, showing theparts adjusted so as to op erate upon a full-width web. Fig. 6 isa likeview showing the parts adjusted to operate upon a half-width'web. Fig. 7is a longitudinal sectional elevation of the delivery mechanism. Fig. 8is a development, on a smaller scale, of the circumference of theform-cylinder, showing the position of the eight forms for printing aneight-page sheet. Fig. 9 is a view. illustrating the order in which theimpressions from these eight forms are imprinted on one side of the web,the opposite side of the web being printed in proper order from thesesame forms. Fig. 10 is a development, upon a like scale, of thecircumference of the formcylinder, showing the position of the fourforms .for'priuting a four-page sheet. Fig.

11 illustrates the order in which the impressions from these four formsare imprinted on a half-width web. Fig. 12 shows a web on which areprinted three sheets in succession having the same side uppermost, andFig. '13 is a diagram illustrating the printing mechanism to producethis result. Fig. 14 shows a printed web on which the alternate sheetshave the same side' uppermost, and Fig. 15 is a diagram illustrating theprinting mechanism to produce this result.

Referring to Figs. 1, 2, and 7, it is to be understood that the printingmechanism is of substantially the construction of that shown anddescribed in United States Letters Patent No. 274,534 and in my formerapplication for Letters Patent, filed in the United States Patent-OificeJune 22, 1883, consisting, essentially, of a type or form cylinder, fourimpressioncylinders, two register-rolls, a web-turner, and suitableinking mechanism. As this mechanism is designed to operate upon either adouble or single width web, so as to print and deliver a productconsisting of either eight or four page sheets, the manner in which itis arranged and operated to produce the eight-page product will be firstdescribed, after which the changes necessary for the production of afourpage product will be explained.

The form-cylinder 100, which is of such size that the forms will occupybut one-half of its circumference, which makes it of a size sufiicientto permit ordinary parallel type to be secured to its periphery, ismounted in bearin gs in an appropriate frame-work, and carries eightforms of type,which, for convenience, it will be assumed are of suitablesize to print the pages of an ordinary eight-page newspaper. These formsare arranged in two groups, located diametrically opposite each other,each group consisting of two pairs of forms, which are placed end to endupon the cylinder, with their columns of matter parallel with its axisand the heads of their pages together at its center. These eight formsare so arranged that those for printing pages 5 4 and 8 1 form onegroup, and those for printing pages 7 2 and 6 3 the other, theforms forpages 5 8 and 7 6 being the advance ones of their respective groups asthe cylinder revolves, as shown in Fig. 8. The spaces upon the cylinderbetween the groups of forms are occupied by ink-distributing tables orsurfaces 125, which are supplied with ink in the usual manner, and fromwhich ink is taken and supplied to the forms by ordinary form-rolls,126, which operate in the same manner as in the well-known Hoetype-revolving press.

Inasmuch as the forms occupy only one-half the circumference of theform-cylinder, it becomes necessary, in order to print the entiresurface of the web, that each form should act twice upon each side ofthe web at each revolution of the cylinder, and to accomplish this fourimpression-cylinders and two registerrolls are provided.

The web to be printed is led from its roll 150 around a leading-roll,48, and thence to and around the first impression cylinder, 101, thenceoutward arounda register-roll, 105, and thence inward again to andaround the second impression-cylinder, 102. The register -roll 105 isplaced at such a distance from the formcylinder that the advance edge ofthe impression made on the web by the first group of forms against thefirst impression-cylinder will arrive upon the secondimpression'cylinder just in time to exactly join with the rear edge ofthe impression made by the same group of forms against that cylinder,from which it results that the first group of forms makes twoimpressions upon the web in succession, the second beingjust in advanceof the first.

Following the rear edge of the impression made by the first group offorms against the first impression-cylinder will be a blank space equalto the space upon the form-cylinder between the groups of forms, and atthe end of this space the second group of forms will make an impressionupon the web against the first impression-cylinder, and, passing tothe-second impressioncylinder, will make a second impression just inadvance of the first, which second impression will just join with theimpression given by the first group of forms against the firstimpression-cylinder, and thus fill the blank space referred to. This operation being repeated at each revolution of the form-cylinder, one sideof the web will be wholly covered, the pages for each side of the sheetoccurring twice in succession, as %I%, {2%, e3, %Z%, &c., as shown inFig. v9.

After passing the second impression-cylinder the web, now printed uponone side, is led around a leadingroll, 49, to a web-turning mechanismwhich is mounted in a movable frame and is similar in construction andoperation to that shown in my application for Letters Patent filed June22,1883, by which it is reversed, so as to present its unprinted side tothe forms. After leaving this webturner the web passes around leadingrolls 50 '51 52 53, and thence to and around the thirdimpression-cylinder, 103. From this cylinder the web passes outwardaround the second register-roll, 106, and thence inward to and aroundthe last impressioucylinder, 104.

The operation of the form-cylinder, in connection with theimpression-cylinders 103 104, to print the side of the web now presentedis exactly the same as already described in connection with the firstpair of impression-cylinders, and consequently need not be repeated.

The distance traveled by the web between IIO the printing of itsopposite sides is so regnbe provided with forwarding-rolls, as 99,similar to those shown in the Letters Patent before referred to. r

The printing mechanism just described may, i

if desired, be provided with tapes, as107, arranged as shown anddescribed in my application for Letters Patent filed April 27, 1882,Serial No. 59,747, to aid in conducting the leading end of the webthrough the mechanism at the commencement of the printingopimpression-cylinders through gears fixed on their respective shafts.The web turning mechanism which'operates to turn or reverse the webbetween the printing of its opposite sides is, as before stated, ofsubstantially the construction shown in my former application forLetters Patent,.and consists, as shownin Figs. 4 and 5, of alaterally-movable frame, 75, in which are mounted two turning-bars, 4041, which are arranged at right angles to each other and at an angle offorty-five degrees to the path of travel of the web, and a leadingroll,42, mounted atthe ends of the bars and arrangedat right angles to theaxis of the formcylinder, said frame being provided with an adjusting-screw, 7 6, by which it can be moved laterally, so as to bringthe bars 40 41 and roll 42 into position to properly reverse a web offull or one-half width.

It has been found in practice that where a web-turning mechanism of thischaracter is used the speed of the printing mechanism is limited by theinability of the paper to withstand the strain due to the frictioncaused by drawing it around the two fixed turning-bars 4O 41 when theprinting mechanism is run at its highest rate of speed. It is verydesirable, therefore, that means should be provided by which this strainupon the paper can be reduced, and .to this end I provide means by whichthe paper is drawn around each bar independently ofthe other, so thatitisrequired I o-withstand the friction of only one bar at a time, thusreducing the strain one-half and consequently permitting the printingmechanism to operate at greater speed with paper of the same quality. Toeffect this the shaft of the roll 42 is provided with a bevel-gear,43,which engages with a like gear,44, mounted on ashaft, 45, which isjournaled in brackets 46,secured to the movable frame 75. The end of theshaft 45 is provided with a pulley, 47, which is connected by a belt,38,with a pulley, 39, upon the driving-shaft 149 of the printingmechanism. The pulley 39 is of sufficient width to allow the belt 38 toshift for the required lateral adjustment of the frame 75,and

' it and the pulley 47 are so proportioned that the roll 42 will havethesame surface speed as the form and impression cylinders.

To insure thepositive drawing of the web around the first turning-bantheroll 42 is provided with three or more elastically-faced cooperatingfeeding-disks, 73, which are mounted upon a shaft,74,and constantlypressed against the roll42 by means ofsuitable springs,9. (See Fig. 5.)These disks are preferably adjusted to run on the blank margins of theweb. The

web is drawn around the second turning-bar by theimpression-cylinders103 104 and registerroll 106 in the usual manner. After leaving the lastimpression cylinder, 104, the web passes between the cutting-cylinders108 109,

which operate in the usual'manner to partially sever the web upon thelines was (see Fig. 9) between its respective printed sheets, afterwhich the web passes into the control-of the tapes 2 3, which areaccelerated in the usual manner, so as to complete the severance of thesheets and create working-spaces betweenthem for the operation of theswitches, and afterward deliver them to the laying of piling mechanism.The cutting-cylinders 108 109, which, as here shown, are ofacircumference just equal to the length of one of the printed sheets,are connected by gears, in the usual manner, with the lastimpression-cylinder, 104, so as to be driven in unison there with.

By an inspection of Fig. 9 it will be seen that as a result of themanner in'which the 1 web has been perfected by the printingmechanismalready described the sheets severed therefrom do not as they travel tothe delivery mechanism all contain the same printed matter upon theirupper or outer surfaces, but that eachalternate pair of sheets bearsdifferent printed pages. For this reason it has been customaryheretofore, when the sheets severed from the web thus perfected were tobe piled in a flat or unfolded condition,to associate the sheets of thesimilarly-printed'pairs, and then direct the alternate pairs todifferent sheetfliers, so that each fly at each stroke piled two sheets.It has been found in practice, how ever, that when working in thismanner the two fliers cannot be operated sufficiently fast to properlypile the sheets as fast as they can be produced by the printingmechanism. This difficulty is overcome in the present invention byproviding two collecting cylinders, 111, and means for directing thepairs of similarlyprinted sheets alternately to each cylinderthat is tosay, means by which those pairs of sheets having pages 42% on theirupper or outer sides are directed to one of said cylinders and thosepairs having pages g3 upon their corresponding sides are directed to theother. When four, six, or any other predetermined number of sheets havebeen'thus collected cylinder in a body and pass to the proper fly to bepiled on the table. It is obvious that by.

this arrangement the speed of the printing mechanism may be increased,while that of the fliers is reduced.

The collecting-cylinders 110 111', which'are open each cylinder, theyare directed off the 7, receive motion in the following manner: Theshaft of the cylinder 110 is provided upon its outer end with a gear,77, (see Fig. 2,) which is connected, through intermediates 114 115,with a gear of like size upon the shaft of the cutting-cylinder 109,while the cylinders 110 111 are connected to eachother by gears 78 79,so that the two collectingcylinders run turn for turn with each otherand with the cutting-cylinders.

The tapes 2 3, which convey the sheets from thecutting-cylinderstothecollecting-cylinders and from the latter to the flies 112 113, arearranged as follows: The tapes 2 pass around pulleys 10, thence abovepulleys 11 and around pulleys 13 14, thence partially around thecollecting-cylinder 111 and pastpulleys 15. From the pulleys 15 allexcept the two outer or marginal tapes of the series return directlyaround pulleys 16. The two marginal tapes, however, pass downward aroundpulleys 17, located just above the fly 113, from which pulleys they alsoreturn around the pulleys 16. The tapes 3 pass around pulleys 18, thenceabove the pulleys l1 and around the pulleys 13, thence above pulleys 19to and partially around the collecting-cylinder 110 and past pulleys 20.From the pulleys 20 all except the two outer or marginal tapes of thisseries return directly around pulleys 21. The two marginal tapes,however, pass downward around pulleys 22, located just above the fly112, and thence return around the pulleys 21.

(lo-operating with the tapes 2 3 and the collecting-cylinders 110 111are two series of tapes, 4 5, which are arranged as follows: The tapes 4pass around pulleys 23, located just below the cylinder 110, thenceupward 7 partially around the said cylinder, returning around pulleys 2425. The tapes 5 pass around pulleys 26, thence upward partially aroundthe cylinder 111, thence around the pulleys 19, returning around pulleys27 28. Co-operating with the tapes 2 3, to aid in conveyiug theassociated sheets from the cylinders 110 111 to the flies 112 113, aretwo se ries of tapes, 6 7, the former of which pass around pulleys 2930, while the latter pass around pulleys 31 32. The spaces between thepulleys 27 and the point where the tapes 3 meet the cylinder 110, andalso between the pulleys 24 and the same point, are bridged by a seriesof stationary guides, 33. which co-operate with the tapes 3 to properlyconvey the sheets onto the said cylinder and to hold them to thecylinder after they have been released from the tapes 4, and the spacebetween the pulleys 14 19 is bridged by a similar series of guides, 34,which operate to hold the sheets onto the cylinder 111 after they havebeen released from the tapes 5. Between the pulleys 13 14 there islocated aswitch mechanism, which may be of any approved form and whichoperates to direct the sheets alternately into the pathways formed bythe tapes 3 5 and the tapes 2 and cylinder 111. As illustrated, theswitch mechanism consists of an ordinary os- -cillating switch, 35,which is operated at each second revolution of the cylinders 110 111 bymeans of a connecting-rod, 54, and the grooved cam 55, which is mountedupon a transverse shaft, 56, which receives motion in the followingmanner: This shaft is provided with a gear, 80, which engages with apinion, 81, secured to an intermediate, 82, which in turn engages withthe gear 77 upon the shaft of the collecting-cylinder 110. The gears 77and 82 are of the same size; but the gear 80 and pinion 81 are soproportioned that the cam makes but one revolution to each fourrevolutions of the collecting-cylinders.

The associated sheets are directed off the cylinders 110 111 by means ofswitches 36 37, which are operated at the proper times throughconnecting-rods 57 58 and bell-crank levers 59 60 from a grooved cam,71, mounted upon a transverse shaft, 72, which is driven by means of agear, 83, which engages with the gear 80 upon the shaft 56, said gears80 83 being so proportioned that the cam 71 makes but one revolution toeight revolutions of the collecting-cylinders;

- The sheet-fliers 112 113 are operated in substantially the usualmanner, their upward movement being effected through connectingrods 6162 and levers 63 64 from cams 65 66 upon the shaft 72, and their returnmovement by springs 67 68, acting upon rods 69 70.

The shafts of-the'pulleys which drive the several series of tapes aredriven by suitable gearing, so as to move in unison, motion beingimparted to them from the inside gears, 81, on the shafts of thecollecting-cylinders, which engage with pinions on the shafts of thepulleys 14, 15, 19, 20, 23, 24, and 26.

The operation of the delivery mechanism thus organized is as follows:The severance of the sheets from the web having been completed by thetapes 2 3, as already stated, the sheets will pass forward between saidtapes until they arrive at the pulleys 13. For convenience it will beassumed that the first sheet which arrives at said pulleys bears pages42% upon its upper or outer surface, and that the switches 35 37 are inthe position shown in Fig. 7. This will cause the first sheet to bedirected onto the collecting-cylinder 111 and be carried around upon itssurface until its leading edge arrives at theswitch 35 upon thecompletionof one revolution of the cylinder, when the leading end of thesecond sheet, which bears the same printed pages upon its upper or outersurface, will likewise be directed onto the cylinder, so as to beassociated with-the first. As the leading end of the third sheet, whichbears the printed pages g9, upon its upper or outer surface, arrives atthe pulleys 13, the switch 35 will be shifted, so that said sheet,instead of being directed onto the cylinder 111, will pass forwardbetween the tapes 3 5 onto the cylinder 110, and the fourth sheet,bearing the same printed pages upon its upper surface, will in likemanner be directed onto the same cylinder and associated with the thirdsheet. As the leading end of the fifth sheet, bearing pages i2 upon itsupper or outer surface, arrives at thepulleys 13, the switch 35 will beshifted back to its first position, so that the fifth and sixth sheetswill be directed to and associated with .the first and second sheetsupon the cylinder 111. Shortly after this takes place the switch 37 willbe shifted, so that as theleading ends of the to four associated sheetspass the pulleys they will be directed off the cylinder and into thebite of the tapes 2 7. The fly 113 having in the mean time been raisedby the cam 66, this lot of sheets will at theproper time be taken bysaid fly and deposited uponthe piling-table 116. As the leading end ofthe seventh sheet, bearing pages g3; upon its upper or outer surface,arrives at the pulleys 13, the switch 35 will be again shifted, so thatthe seventh and eighth sheets will be directed onto the cylinder 110 andassociated with the third and fourth sheets. As the leading end ofthesefour associated sheets arrives at or near the pulleys 20, the switch 36will be operated, so that as the sheets pass the pulleys they will bedirected off the cylinder and into the bite of the tapes 3 6. The fly112 having in the meantime been raised by thecam 65, this lotof sheetswill at. the proper time be takenby said flyand deposited upon thepiling-table 117, and so the operation will continue to be repeated, thesheets bearing the inside pages upon their upper surfaces being directedto and associated in lots of four each by one cylinder and delivered toone fly, while the sheets bearing the outside pages upon their uppersurface are directed to and associated in like lots by the othercylinder and delivered to the other fly, thus causing all the sheetsupon each piling-tab1e to occupy a uni form position, and at the sametime permitting the printing mechanism to be operated at a very high andthe sheet-flyers at a comparatively low rate of speed.

By changing the speed of the shaft 72, which carries the cams 71, 65,and 66, the switches 36 37 maybe operated at every twelfth, sixteenth,or other revolutionof the collectingcylinders, so that the sheets,instead of being 5 associated into lots of four, will be associated.

into lots of six, eight, or more before passing to the flies.

If it should be desired to operate the printing and delivery mechanismsherein described to produce and deliver a product consisting of fourinstead of eight page sheets, the two pairs of forms for printing thefour pages will be placed upon one end of the form-cylinder, the headsof the pages of one pair lying at the end 6 of the cylinder and theheads of the other pair at its center, as shown in Fig. 10. Aweb ofone-half the former width will be used and the web-turner will be soadjusted as to properly reverse said narrow web, as shown in Fig. 6 andas described in my former application for Letters Patent before referredto. When the printing mechanism is thus arranged, the

{pages will be printed in the order shown in Fig. 11. The web will thenbe severed upon .the lines a w, and all sheets bearing pages 3 2 1 upontheir upper surfaces will be directed to and associated, say, by thecylinder .111 and piled by the fl'y.1l3, while all sheets hearing pages4 1 upon their upper surfaceswillf be directed to and associated by thecylinder 110 and piled by, the fly 112 in thesame manner as alreadydescribed in connection with the eight-page sheets.

Although the system of taping herein shown and described is regarded,all things considered, as the best for giving the requiredmovements tothe sheets, yet it v.will be readily understood that it may be varied inmany of its details without departing from the invention. Thecollecting-cylinders 110 111 may. also, if desired, be provided withgrippers .or. other sheet-retaining devices for holdingthe leading endsof the sheets to the surfaces. The roll 42 of the web-turner may also bedrivenV by 4 different means from that shown. If found more desirable,gearing may be substituted for the belt; 38, one of the gears being madecapable of. sliding on its shaft to permit of the lateral adjustment ofthe turner. Y

As shown in Figs. 1, 2, and 7 of the drawings and as thus far described,the form-cylinder is of such size that the forms, cover onehalf of itscircumference and consequently is provided with two impression-cylindersfor each side of the web. The form-cylinder is not,.howeve-r, limited tothis size. It maybe of such size-that the forms will cover its entirecircumference, or any aliquot part thereof, and be provided with acorresponding .number of impression-cylinders. Fig. 13 illustrates anorganization in which the forms cover only one-third of thecircumference of'the formcylinder and in which threeimpression-cylinders are consequently employed for each side of the web.When the printing mechanism is thus organized, the web, instead of beingprinted so that its alternate pairs of sheets will have the same printedpages upon their corresponding sides, will be printed so that itsalternate series of-three sheets will have the same pages upon theircorresponding sides, as indicated in Fig. 12. When the web is thusprinted, the mechanism which operates the,

switch 35 will be so modified that series of three sheets will bealternatelydirected to each of the collecting-cylinders, and themechanism for operating the switches 36 37 and theflies will bemodified, so as to cause said switches and flies to properly co-operatewith the cyl inders. As hereinbefore described, the-forms are arrangedin two groups upon theform-cylinder; but it is also to be understoodthat the invention is not limited to, such an arrangement of the forms,as the forms may, if pre-' ferred, be arranged in a single group, asindicatedin Fig. 15. When the forms are arranged in this manner,or whenthe forms are so large or of such number that theycover the wholecircumference of the form cylinder, the web,

instead of being printed so that the alternate pairs or series of sheetswill have different printed pages upon their corresponding sides, willbe printed so that its alternate sheets will have different printedpages upon their corresponding sides, as shown in Fig. 14. When the webis thus printed, the mechanism which operates the switch 35 will bemodified, so that alternate sheets will be directed to each of thecollecting-cylinders.

A threading-tape located j ust outside of each edge of the web andfollowing its course through the machine, and also the combination, withthe form and impression cylinders and webturners, of associatingmechanisms for associating like sheets together, and also the same incombination with two piling mechanisms are not herein claimed, as suchmatter is claimed in my application filed April 27, 1882, Serial No.59,747, now Patent No. 367,123. Neither is the combination,with aprinting mechanism capacitated to operate upon webs of differentwidths,of a movable web-turner, whereby webs of different widths may bereversed without lateral transfer, and also the same where the printingmechanism is capacitated to print both sides of the web from the sameforms, and also the combination, with the turning-bars and their rollmounted upon a movable frame or carriage, of means for adjusting theposition of said frame, herein claimed,as such matter is claimed in myapplication filed June 22, 1883, Serial No. 98,901, now Patent No.372,721.

What I claim is- 1. The combination,with the bars 41 and the driven roll42, forming a web-turner,of the disks 73, co-operating with said roll toform a web-feeding mechanism, substantially as described.

2. The combination,with thebars 40 41 and 0 the driven roll 42, forminga web-turner, said bars and roll being adjustable to differentpositions, of shifting connections by which said roll is driven from thesame moving part in its different positions, substantially as described.5

3. The combination, with a web-printing mechanism in which the same formmakesa plurality of impressions upon the same side of the web at eachrevolution of the form-cylinder, of a websevering mechanism, a switchmechanism for directing the sheets into two different pathways,according to the positions of their printed pages, two collecting orassociating mechanisms--one located in each pathwayand two sheet layingmechanisms, all

substantially as described.

4. The combination, with a web -printing mechanism in which the sameform makes a plurality of impressions upon the same side of the web ateach revolution of the form-cylin- 6c der, of a web-severing mechanism,two collecting or associating mechanisms, and a switch mechanism fordirecting alternate pairs or series of sheets to each of said collectingmechanisms, all substantially as described. 6

In testimony whereof Ihave hereunto set my hand in the presence of twosubscribing wit nesses.

STEPHEN D. TUCKER. Witnesses:

CHAS. W. CARPENTER, W. F. SMART.

